Fold over disk harrow



Dec. 16, 1958 w. P. OEHLER ETAL ,8

FOLD OVER DISK HARRow Filed July 17, 1956 2 Sheets-Sheet 1 INVENTORS. YWILLIAM P. OEHLER CHARLES H. YOUNGBERG Dec- 16, 1958 w. P. OEHLER ET AL2,864,222

FOLD OVER DISK HARROW Filed July 17, 1956 2 Sheets-Sheet 2 FIG. 2

m g (D I VENTORS. WILLIAM LER CHARLES Y UNGBERG ATTORNEYS United StatesPatent assignors, bymesne. assignments, to Deere & Com- ;pany, .a.corporation of. Delaware The present invention relates generallyice-agricultural implements andm'oreiparticula'rl-y to a: pick-up orlift t'ype di'skharrow'. i

The object-and general nature of the present invention is aprovision ofapiclt-up or lift{type-disk harrow' having new andim-proved meanswhereby the rear gangs of the harrow may, when desired, be swung from anoperating position over onto the front gangs when it is not desired tohave any tandem disk harrow' action.

' Angimportantj feature of this'invention is the provision of a lifttype di'sk harrowdnwhich the rear gangs are ihdividhally swirl gablebetween a position coplanar with the front gangs and aposition overlyingthe front gangs, thereby adding weight'tothe latter, with means rigidlyhoidi'ng" the rear. gangs in coplanarrelationship, and morespecifically, it is a feature ofthis: invention to provide rear gangholding means in the form of a rear frame extension that'isrig-id withthe front gang frame, extendi'ng" nearwardly therefrom and adapted toberigidly connected to -the rearm'ost portions of the rear gangs when intandem operating position.

These and other objects and advantagesof the present invention willbeapparent to those skilled inthe art after aconsideration of thefol-lowing detailed description, taken in conjunction with theaccompanying drawings-,im which Y .Ei'gt.'l= is: a. perspective view ofa; tandem lift type disk harrow in whichtthe' principles of the!presentinvent-ion' have been incorporated, the harrow being illustratedas: connectedv to. a tractor having what is cornmo-nlycreferred to as; athree point hitch, which. hitch includesv an upper thrust oncompnessionlinlc and a pair .ofll'ower: draft or tensioml'm'ks,

Fig. 2: is a' View similar to Fig; h, showing the rear gangsswungk. out:of their coplanar relationship with the front-gang. means and into aposition substantially" direct- 11y oven the. l'atterso as.- to: add?their weight: to thelatter and thus-increase the penetration of. thefront disks.

I Referring first to Fi'g'..'1i,. the. disk hriarow is indicatednormally is carriedby the tractor and'i's adapted to re ceive variousagricultural implements, among which is the disk harrow 10. v

The disk harrow includes a front disk gang means that is made up of afront transverse frame 17 having a rear frame extension 18 and carryingright and left hand front gangs 21 and 22. The frame means 17 includes afront transverse bar 24, a rear transverse bar 25, end bars 26 andcenter bars 27, the latter being extended rearwardly, forming the abovementioned rear frame extension 18. Bearing standards 31 extenddownwardly from the end frame members 26 to receive bearing means 32Patented De 16, was

2 by' which the outer ends of the disk gangs 21 and 22 are connectedwith the outer portions of the transverse frame structure 17. The innerends of the frontgan'gs 21" and 2'2 carry similar bearing means (notshown that are connected tothe lower ends of bearing standardsfii f, oneof which is shown iri Fig. 2, which standards ar'e' connected at theupper'end to the forward pbrtionsof the center frame bars! 27.Theseportions of" the center bars-27 extend rearwardlv in divergentrelation, being disposed generally parallel to therearwardly"divergentendbars 26. The bar sections making up the rear frarneextension 1 8- arebent so as toext'end, rearwardly neonverging relation, and-the rear'endsof these barpforti ons; indicated at'27rz in Fig, 2, areih'terc'onnectfedfby some bar 36 that includes'an aperture'd portion-37through which the rear portion of an upwardly and fovvardly extendingbrace member 3 9' is disposed. The forward end of the brace member 391's suitably connected to' the upper portion or mast section 41 ofagenerally vertical hitch frame indicated in its entirety byth'ereference nu; m'eral 42. The lower portion of the hitch frame 42"includes a socket section 43 thatis adapted t'o"d et-acliab'ly receive acrossbar 44 theends of whichare' formed as studs and/or detachabl-y'connected with-the rear ends of the tractor draft links 15. 7 Suitablelatch means 45 (which does not form" any significant portion of tliepresentinvention optionally locks the crossbar" 44 th: the-socketsection 43 Preferably, the upper end of'thebrace rod 39 is connectedbymeans of a yoke 47 and apivot' 48 with the upper portion of the mastsection 41". A pair of cushioning springs 5-1 and 52'- are' disposed ontherear end of the brace. rod 39-, onopposite sides of the crossbar 36,the: inner ends of the springs 51 and 52" hearing? against the crossbar36" while the outer endshear against suitable: abut-ment's 54a nd 55 onthe hrace'rod 39: i

The: disk hanrow- 10 also includes a pair of rear gangs; indicated.generallyat 6'1 and 62. Each of thesl'e rear gangs includes: adisklgang:sectionthat-is rnade up of disks 64 andarr interconnecting:gang bolt 65 together with associated spacing spools fidv and-bearing"m'ea-ns 67,"t her'e' being one' of such bearing means at each end of therear gang. Each gang of disks 64 is connected are real" gang frame 65abymeans of pairs of bearing standards 66aand 67a suitably secured, asbywelding or thelile', at their upper ends to a curved: angle-bar 68 thatforms the principal portion of the: rear gang frame: 65." The -l 'atteralso includes a crossbar, preferably also an angle','as indicated at.69,. to which the bearing standard 67'aat the inner end; of theassociated gang of' disks are connect ed. A pair of. lugs; 71 are fixedto the transverse rear portion of the rear gangframe: and are.aperturerltto-re ceive pivot bolts- 72. by which thelugs-=719arezs'wingabl-y' connected with. similar lugs 73. carried by the associated:portion of the transversev frame. member 25".- of. the front: gangmeans. v I

The leftsh andl'rear gangfis. oflsub stantiallyidentical construction,except that certain parts: may bev left. hand nstead of. ri'ght hand,asthat just described and; hence; the same reference numerals havebeeneinployed;

ments or rests positioned to receive the rear bar sections of the reargangs, when the latter are in their folded or forwardly disposedpositions, as shown in Fig. 2.

When the rear gangs are in operating position, in

which they occupy positions in the same plane as the front gang means,the rear gangs are swung downwardly from the positions shown in Fig. 2into positions at opposite sides of the rear frame extension 18, asshown in Fig. l. The laterally inner portions of the rear gang framesare rigidly connected to the rear frame extension 18 by means of atransverse bar 81 that is bent to correspondto the angularity of therear frame sectionsof the rear gang frames. The central portion of therear extension crossbar 36 carries a forwardly extending hook section83,: and the rearwardly laterally inner end of each rear frame carries aforwardly extending hook section 84, .the hook sections 84 being spacedrelatively closely to the hook section 83. As best shown in Fig. 1, onefiange of the transverse bar 84 is adapted to be passed rearwardly intointerengagement with the hook sections 83 and 84, and then bolts 85 areinserted in associated openings for locking the transverse bar 84 to therear frames, whereby the rear gangs will be rigidly and securely held inproper coplanar relationship with the front gang means.

While we have shown and described above the preferred structure in whichthe principles of the present invention have been incorporated, it is tobe understood that our invention is not to be limited to the particulardetails, shown and described above, but that, in fact, widely differentmeans may be employed in the practice of the broader aspects of ourinvention.

What we claim, therefore, and desire to secure by Letters Patent is:

1. A lift type disk harrow adapted to be connected to a propellingtractor, comprising a transverse frame adapted to be connected with thetractor and including a rear part extending rearwardly from thegenerally central portion of said frame, front gang means carried bysaid transverse frame, a pair of rear gang units pivotally connectedwith said main frame and disposed above said rearwardly extending part,each of said rear gang units being independently movable from a positionin rear of the front gang means to a position substantially over thelatter, and means connected with the rear portions of said rear gangsand said rear part for holding said rear gangs in rigid relationshipwith said transverse frame.

2. The invention set forth in claim 1, further characterized by anupwardly extending frame part connected with the forward central portionof said transverse frame, and brace means extending from the upperportion of said upwardly extending part rearwardly in a vertical planelying between said rear gang units to the rear end of said frameextension.

3. A lift type disk harrow adapted to be mounted on a tractor havinghitch means serving as a three point hitch, said disk harrow comprisinga generally verticalhitch frame having upper and lower connection pointsto receive said hitch means, a front disk harrow gang including atransversely disposed frame including a rear-' wardly directed generallycentrally disposed frame extension, means rigidly connecting thetransverse gang frame with said hitch frame, a pair of rear gangsdisposed at opposite sides of said rear frame extension and hingedlyconnected at their forward portions with the adjacent rear portions ofisaid'front gang frame, and means connecting the rear laterally innerportions of said rear gangs to the rear portion of the rear frameextension to hold said rear gangs in rigid relation to said front gang.

4. A lift type disk harrow adapted to be mounted on a tractor havinghitch means serving as a three point hitch, said disk harrow comprisinga generally vertical hitch frame having upper and lower connectionpoints to receive said hitch means, a front disk harrow gang including atransversely disposed frame hingedly connected along its front portionwith the lower portion of said hitch frame and including a rearwardlydirected generally centrally disposed frame extension, a pair of reargangs disposed at opposite sides of said rear frame extension andhingedly connected at their forward portions with the adjacent rearportions of said front gang frame, the rear end of said frame extensionbeing disposed adjacent and between the rear portions of said reargangs, brace means connected between the rear end portion of said rearextension and the upper portion of said hitch frame, and meansconnecting the rear laterally inner portions of said rear gangs to therear frame extension to hold said rear gangs in rigid relation to saidfront gang.

5. The invention set forth in claim 4, further characterized by saidlast mentioned means comprising a part extending over the rear end ofsaid frame extension and the adjacent portions of said rear gangs andsecured to the latter to hold them in coplanar relationship.

6. The invention set forth in claim 4, further characterized by saidlast mentioned means comprising a transverse bar extending over the rearend of said frame extension, means connecting the end portions of saidbar with the adjacent rear portions of said rear gangs, and meansconnecting the central portion of said bar to the rear part of saidframe extension.

7. A lift type disk harrow comprising a front transverse frame includingfront and rear transverse bars and central and end bars rigidlyconnected with said transverse bars, said central bars extendinggenerally rearwardly of the rear transverse bar, front disk gang meanscarried by the central and end bars of said front frame, a pair of reargangs, each including a gang frame, means connecting said rear gangframes for hinging movement to the generally outer portions of the rearbar of said front frame at opposite sides of said central bars,

the inner ends of said rear gangs being disposed adjacent. the rearextended portions of said central frame has.

and means connecting the rear laterally inner portions of said rear gangframes with the rear ends of said central bars.

8. The invention set forth in claim 7, further charried by said bracebar and disposed on opposite sidesof said apertured cross member.

References Cited in the file of this patent UNITED STATES PATENTS2,704,018 Oehler et al. Mar. 15, 1955 Robertson June 2, 1953,

